Re: echo text - anti-spam-spider measure

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http://themfund.com/snippets/test.php

Has %HEX, &#entity;, and even a entity version of the hex!

On 2/28/07, Richard Lynch <ceo@xxxxxxxxx> wrote:
On Wed, February 28, 2007 1:20 am, Stut wrote:
> Of all the possible methods, entities are the easiest for bots to
> handle. They just need to decode the entities.
>
> More reliable methods involve using javascript to write out the
> mailto:
> tag. Do it in several statements. But even then, some of the smarter
> spiders will execute simple javascript like that. You can make it
> better
> by using onload to execute the javascript which means the spider will
> need to implement that, which I don't believe they do at the moment.
>
> Of course the best way is to use an image and don't link it. If it's
> just a way for visitors to contact you, use a contact form. You don't
> expose the email address and can control it a lot better.

I'm no expert, but as far as I can tell from my readings on this
subject, the reality is that spammers just don't bother to harvest
them.

Ongoing studies, older studies, newer studies.

Everybody knows that the spammers *could* decode HEX or even the JS
fairly trivially, but they don't.

There are many theories [*] as to why that is, but the empirical
evidence is that the obfuscation is very effective at reducing spam
dramatically, no matter how silly that seems.

* Maybe it's too much low hanging fruit.  Maybe they don't want to
risk hitting honey-pot emails.  Maybe anybody smart enough to
obfustcate is too smart to fall for the stupid spam anyway. ...

--
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I want you to buy a CD from some starving artist.
http://cdbaby.com/browse/from/lynch
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